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1da177e4 LT |
1 | #ifndef _X8664_SCATTERLIST_H |
2 | #define _X8664_SCATTERLIST_H | |
3 | ||
4 | struct scatterlist { | |
5 | struct page *page; | |
6 | unsigned int offset; | |
7 | unsigned int length; | |
8 | dma_addr_t dma_address; | |
9 | unsigned int dma_length; | |
10 | }; | |
11 | ||
12 | #define ISA_DMA_THRESHOLD (0x00ffffff) | |
13 | ||
14 | /* These macros should be used after a pci_map_sg call has been done | |
15 | * to get bus addresses of each of the SG entries and their lengths. | |
16 | * You should only work with the number of sg entries pci_map_sg | |
17 | * returns. | |
18 | */ | |
19 | #define sg_dma_address(sg) ((sg)->dma_address) | |
20 | #define sg_dma_len(sg) ((sg)->dma_length) | |
21 | ||
22 | #endif |